Patents by Inventor Chi-kong Chu

Chi-kong Chu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Unidirectional airflow ventilating shoe and a unidirectional airflow ventilating insole for shoes
    Patent number: 5010661
    Abstract: A unidirectional airflow ventilating shoe having a ordinary upper and sole. A unidirectional airflow ventilating layer (1) is provided on the sole inside the shoe. The ventilating layer has an compressible cavity (2), air inlet (3), main airflow passage (4), branches (5) and air outlets (6). Fresh air outside the shoe is forcedly unidirectionally sucked into the ventilating layer and blown out to fore part inside the shoe.To convenience sake, a unidirectional airflow ventilating insole can be made for any kind of shoes. The insole comprise a upper portion (7) and lower portion (8). The structure and shape of the upper portion is the same that of the ventilating layer (1). Lower portion (8) can either form an entirety with upper portion (7), or be an elastic substrate athered to the bottom surface of the upper portion with adhesines. The insole can be used in any kind of shoes and attain the same result as unidirectional airflow ventilating shoes of the present invention.
    Type: Grant
    Filed: May 2, 1990
    Date of Patent: April 30, 1991
    Inventor: Chi-kong Chu